Optical disk having first and second recording areas with wobble

Details Optical disk having first and second recording areas with wobble Optical disk having first and second recording areas with wobble

1994-08-31

1999-07-20

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692753, G11B 724

Patent

active

059264535

ABSTRACT:
A recordable optical disc on which information is recorded by applying a light beam on the surface thereof, includes: a first recording area on which information is recorded and reproduced while the disc is rotated at a first linear velocity; and a second recording area on which information is recorded and reproduced while the disc is rotated at a second linear velocity. The first recording area and the second recording area include guide grooves having wobble frequency lower than frequency band of EFM signal.

REFERENCES:
patent: 4769802 (1988-09-01), Tatsduguchi
patent: 4940618 (1990-07-01), Hamada et al.
patent: 4942565 (1990-07-01), Lagadec
patent: 5204852 (1993-04-01), Nakagawa et al.
patent: 5218599 (1993-06-01), Tsuyoshi et al.
patent: 5315400 (1994-05-01), Kurata et al.
patent: 5325352 (1994-06-01), Matsumoto

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